How to implement self-defined partition assignment strategy when consumer group rebalance happens?

[op-hunter]

Read the FAQ first: https://github.com/edenhill/librdkafka/wiki/FAQ

Description

As far as I can see, when consumer group rebalance happens, the new partition assignment strategy is performed by group leader. I want to know whether librdkafka provides related API to set user-defined partition assignment strategy.

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Checklist

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Please provide the following information:

• librdkafka version (release number or git tag): <REPLACE with e.g., v0.10.5 or a git sha. NOT "latest" or "current">
• Apache Kafka version: <REPLACE with e.g., 0.10.2.3>
• librdkafka client configuration: <REPLACE with e.g., message.timeout.ms=123, auto.reset.offset=earliest, ..>
• Operating system: <REPLACE with e.g., Centos 5 (x64)>
• Provide logs (with debug=.. as necessary) from librdkafka
• Provide broker log excerpts
• Critical issue

[C4ptainCrunch]

@op-hunter: it looks like it's not possible at the moment (see feature request #2284: Feature request: Support pluggable partition assignment algorithms for consumer)